EP0094955B1 - Procede d'emballage d'articles disposes sur des plateaux dans un film extensible et machine de mise en oeuvre du procede - Google Patents

Procede d'emballage d'articles disposes sur des plateaux dans un film extensible et machine de mise en oeuvre du procede Download PDF

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Publication number
EP0094955B1
EP0094955B1 EP82903494A EP82903494A EP0094955B1 EP 0094955 B1 EP0094955 B1 EP 0094955B1 EP 82903494 A EP82903494 A EP 82903494A EP 82903494 A EP82903494 A EP 82903494A EP 0094955 B1 EP0094955 B1 EP 0094955B1
Authority
EP
European Patent Office
Prior art keywords
tray
film
stretch film
articles
glue
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP82903494A
Other languages
German (de)
English (en)
Other versions
EP0094955A1 (fr
Inventor
Folke G.A. Stenberg
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
IWEMA PACK AB
Original Assignee
IWEMA PACK AB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by IWEMA PACK AB filed Critical IWEMA PACK AB
Publication of EP0094955A1 publication Critical patent/EP0094955A1/fr
Application granted granted Critical
Publication of EP0094955B1 publication Critical patent/EP0094955B1/fr
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B11/00—Wrapping, e.g. partially or wholly enclosing, articles or quantities of material, in strips, sheets or blanks, of flexible material
    • B65B11/50—Enclosing articles, or quantities of material, by disposing contents between two sheets, e.g. pocketed sheets, and securing their opposed free margins

Definitions

  • the subject invention concerns a method of wrapping articles arranged in a group on a tray in stretch film.
  • the strands of glue are applied to each one of two opposite walls of the tray, whereupon gripping means extend a length of stretch film over the group of articles and the tray with the group of articles thereon is assembled with the stretch film in a manner ensuring that the film encloses the group of articles and is pressed against the parts of the tray where the glue is applied.
  • a typical package produced according to this method is disclosed in US PS 4 036 362.
  • shrink film In packaging articles in a tray of cardboard or corrugated paperboard either shrink film or stretch film is used as a rule.
  • Shrink film is comparatively inexpensive but requires investment in shrink tunnels and energy for operating them.
  • DE-A-2 516 071 discloses a packing apparatus and method using film for enclosing an assembly of grouped articles. Clamping jaws positioned at one side of the assembly of articles are moved to the opposite side thereof, bringing along the web of stretch foil to attach the edge portion of the foil to the article assembly.
  • the path of movement of the jaws to enclose the assembly of articles in film becomes quite long and the speed of operation of the apparatus is limited accordingly.
  • US-A-4 035 985 describes an apparatus for wrapping goods in a sheet of stretchable film material. However, the marginal portions of the sheet are tucked inwardly underneath the package with consequential considerable waste of expensive stretch-film material.
  • the method in accordance with the subject invention has for its purpose to allow articles, arranged in a group on a tray, to be wrapped in stretch film, using a minimum amount of the film.
  • the method is realized with the use of comparatively few means, with the result that the wrapping line requires very little space.
  • the method in accordance with the invention is characterised in that two horizontal strands of glue are applied on each one of said two opposite walls of the tray, one strand above the other,
  • the invention likewise comprises a machine for performing the method.
  • the machine includes an elevating table with conveying means thereon for advancing trays with groups of articles thereon up to and away from glue spray nozzles which are positioned on either side of the elevating table for the purpose of applying strands of glue on two opposite walls of the tray.
  • the machine in accordance with the invention is characterised by the provision of two manipulating members which are arranged to move towards and away from one another.
  • the first manipulating member is equipped with a first pair of clamping jaws and is arranged to grip the stretch film with the aid of said pair of jaws and upon its movement in the direction away from the second manipulating member to pull the stretch film over the group of articles.
  • the second manipulating member is likewise equipped with a pair of clamping jaws serving to hold the stretch film on that side of the group of articles that is opposite the first pair of clamping jaws, while the film is being tensioned about said group of articles, and further with severing means to cut the required length of film, with retainer means to hold the towards end of the stretch film which is intended to be used for the following wrapping operation, as well as with two glue spray nozzles on either side of the tray, one arranged above the other and each one applying a strand of glue on one of the side walls of the tray.
  • the elevating table is arranged to raise the tray with the group of articles thereon upwards against the stretch film.
  • the manipulating members while being moved simultaneously from opposite directions inwards towards the tray wrap the group of articles in the stretch film and with the aid of their clamping jaws they press the film ends against initially the upper one of the strands of glue and after the gripper means having released their grip of the film press this one against the lower one of the strands for adhesion of the stretch film to the tray.
  • the packaging machine illustrated in Fig. 1 is provided with an elevating table 1 onto which trays 2 with a group of articles 3 thereon are advanced by a conveyer belt (not shown).
  • the elevating table 1 is provided with a drive mechanism comprising a motor 4, a transmission belt 5 and drive belts 6 by means of which the trays may be transferred from the conveyor belt onto the elevating table 1 into contact with a sensing means 7 serving to stop the tray displacing movement when the table assumes its lower position shown in Fig. 1.
  • glue-applicators glue spray nozzles
  • the tray 2 is arranged to move past the glue applicators before it reaches the sensing means 7. Raising and lowering of the elevating table 1 to or from an upper level is effected by means of a piston-and-cylinder unit 9. Two control guides 10 are provided for guidance vertically.
  • a roller conveyor (not shown), onto which the finished trays are discharged, and a supply roll 11 holding stretch film 12.
  • Two manipulating members 13 and 14 are provided at the upper level of elevation to handle the stretch film 12.
  • the manipulating members are arranged to be moved towards and away from one another, these movements being effected by a motor 15 which is connected to a drive shaft 17 via a transmission belt 16.
  • the drive shaft 17 supports two cog belts 18 travelling about two tensioning rolls 19.
  • the drive shaft 17 and the tensioning rolls 19 are arranged in parallel and in the same horizontal plane.
  • the manipulating members 13, 14 are mounted for sliding motion along horizontal guides 20, the first one 13 of the manipulating members being connected to the upper belt parts of the cog belts 18 by means of a clamping joint 21 while the second manipulating member 14 is connected to the lower belt parts of the cog belts 18 by means of a similar clamping joint 21.
  • the two manipulating members Upon operation of the motor 15 the two manipulating members therefore are moved at the same speed towards or away from one another along the guides 20, depending on the motion of the motor.
  • the stretch film 12 extends from the storage roll 11 via a deflector roll 22 to a retainer element 23 provided on the right-hand manipulating member 14 as seen in Fig. 1.
  • the retainer element 23 consists of a piston-and-cylinder unit 24 supporting at one end a clamping shoe 25 serving as a back-up means26. The latter is provided with a ruler 27 projecting horizontally towards the left-hand manipulating member 13.
  • the manipulating member 14 is provided with a clamping jaw 29 which is pivotally mounted on a pin 28 on the upper face of the web of stretch film 12, and with a similar clamping jaw 31 which is pivotally mounted on a pin 30 on the tower face of the film 12.
  • the two clamping jaws 29, 31 are operated by piston-and-cylinder units 32 so as to perform a movement along a curve having a comparatively large radius.
  • the left-hand manipulating member 13 as seen in Fig. 1 is also provided with clamping jaws 33, 34, one of which is pivotally mounted on a pin 35 on the upper face of the stretch film 12, the other one being similarly pivotally mounted on a pin 36 on the lower face of the film web.
  • These two clamping jaws are operated by piston-and-cylinder units 37 having a shorter stroke length than do units 32 operating the right-hand manipulating member jaws.
  • the distance between the pivot pins 35, 36 and the clamping jaws 33, 34 is smaller than the distance between the pivot pins 28, 30 and the clamping jaws 29, 31 of the right-hand manipulating member 14. Consequently, the two clamping jaws 33, 34 are able to perform a movement along a curve having a comparatively small radius.
  • the machine operates in the following manner.
  • a tray 2 of corrugated paperboard supporting articles 3 arranged in a group thereon (see Fig. 1) is transported from the conveyor belt onto the elevating table 1 which is positioned at the lower level of elevation.
  • the glue spray nozzles 8 apply glue onto each one of the long walls of the tray, for instance as is shown at 38 representing two horizontal and parallel strands of glue.
  • the glue may cover the entire tray wall.
  • the two manipulating members 13, 14 are moved towards one another by the motor 15, as shown in Fig. 1.
  • the clamping shoe 25 of the retainer element 23 abuts against the back-up means 26, a piece of the stretch film 12 projecting between said last-mentioned shoe and back-up means while supported by the ruler 27.
  • the two clamping jaws 29, 31 open sufficiently far to allow the two clamping jaws 33, 34 mounted on the manipulating member 13 to reach in between the two first-mentioned clamping jaws, gripping the ruler 27, as shown in Fig. 3 and entraining the film end away from the ruler 27.
  • the retainer element 23 is lifted off the back-up means 26, whereupon the two manipulating members 13, 14 may be moved apart by the motor 15 and the cog belts 18, whereby a length L, of the film (see Fig. 4) is pulled out between the two manipulating members.
  • the clamping jaw pair 29, 31 thereafter grips the film 12 and the two manipulating members 13, 14 are moved a further distance apart, 2 x L 2 , while tensioning the film in the lengthwise direction thereof.
  • the clamping jaw 29 is provided with a severing means 39 which cuts off the film as the clamping jaws 29 and 31 are moved into contact with one another.
  • the elevating table 1 is ready to be lifted upwards between the guides 20 and the cog belts 18 to the upper level of elevation.
  • the two manipulating members 13, 14 move closer towards one another until the clamping jaws 29 and 33 abut against the longer walls of the tray (see Fig. 5).
  • the film is still kept tensioned.
  • the two clamping jaws 29 and 33 are provided with pressure pads 40 urging the stretch film 12 against the upper one of the horizontal glue strands 38 (alternatively, against the upper portion of the tray wall) on either side of the tray 2.
  • the two lower clamping jaws 31 and 34 are actuated to release their grip.
  • the stretch film ends thus are released, the elevating table 1 is raised, and the stretch film ends then move into position against the walls of the tray and are pressed by the pressure pads 40 against the lower glue strand 38 (alternatively, the lower portion of the tray wall) on either side of the tray 2.
  • the latter is now ready to be transferred by the drive belts 6 onto the roller conveyor.
  • the manipulating members 13,14 are again moved slightly apart in order not to prevent that tray movement, when the tray has been removed from the elevating table 1 the latter is again lowered by the piston-and-cylinder unit 9 to the lower level of elevation while at the same time the manipulating members 13, 14 are returned to the position illustrated in Fig. 1. Since the stretch film is still retained by the retainer element 23 it is entrained in this movement and the machine is ready to perform the next operating cycle.
  • the method of wrapping articles in stretch film may be performed in a rational manner. Because the stretch film, having been extended across the articles, is applied and secured to two opposite walls of the tray 2 and not, as is the case when using prior-art technique, pulled in underneath the bottom face of the tray and secured thereto or, as is often the case, even wrapped about the entire package, each package uses considerably less of the expensive stretch film material. In addition, the smaller amount of wrapping material also has the advantage of making it easier to open the package as the latter need no longer be lifted to loosen the film off the tray. Furthermore, because the wrapping operation is carried out on a short vertical path through the machine, the latter may be designed as a compact unit, requiring comparatively little space.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Basic Packing Technique (AREA)

Claims (4)

1. Procédé d'enveloppement d'articles (3) disposés en un groupe sur un plateau (2) dans de la pellicule extensible (12) en appliquant des filets (38) de colle sur chacune de deux parois opposées du plateau, en déployant un tronçon de pellicule extensible(12) par dessus le groupe d'articles avec l'aide de moyens de serrage (13, 14) et en assemblant le plateau (2), avec le groupe d'articles (3) dessus, à la pellicule extensible d'une manière qui assure que la pellicule enferme le groupe d'articles (3) et soit poussée contre les parties du plateau (2) où la colle est appliquée, caractérisé en ce que l'on applique deux filets horizontaux (38) de colle sur chacune des deux parois opposées du plateau (2), un filet au-dessus de l'autre,
en ce que l'on pousse contre les filets (38) deux parties marginales opposées du tronçon de pellicule extensible (12), initialement une partie intérieure de chaque partie marginale contre celui des filets (38) qui est en haut,
en ce que les moyens de serrage (13, 14) relâchent ensuite leur serrage sur les parties les plus extérieures des parties marginales de la pellicule, . -
et en ce qu'ensuite on presse la partie la plus extérieure de chaque partie marginale de pellicule contre celui des filets (38) qui est en bas, pour l'adhérence de la pellicule extensible (12) au plateau (2).
2. Machine pour mettre en oeuvre le procédé d'enveloppement d'articles (3) disposés en un groupe sur un plateau (2) dans de la pellicule extensible (12), selon la revendication 1, cette machine comprenant une table de levage (1) avec des moyens de transport (4, 5, 6) dessus pour faire avancer des plateaux (2), avec des groupes d'articles (3) dessus, jusqu'aux buses de pulvérisation de colle (8) et les en éloigner, ces buses étant placées de chaque côté de la table de levage (1) afin d'appliquer des filets (38) de colle sur deux parois opposées du plateau, caractérisée par deux organes de manipulation (13, 14) qui sont conçus pour se rapprocher et s'éloigner l'un de l'autre, le premier (13) de ces organes de manipulation étant équipé d'une première paire de mâchoires de serrage (33, 34) et conçu pour enserrer la pellicule extensible (12) avec l'aide de cette paire de mâchoires et, lors de son mouvement dans le sens qui s'éloigne du deuxième organe de manipulation (14), pour tirer la pellicule extensible (12) par dessus le groupe d'articles (3) et le deuxième (14) de ces organes de manipulation étant également équipé d'une paire de mâchoires de serrage (29, 31) servant à retenir la pellicule extensible (12) sur le côté du gorupe d'articles (3) qui est opposé à la première paire de mâchoires de serrage (33, 34) pendant que la pellicule est étirée autour du groupe d'articles, et, en outre, de moyens de sectionnement (39) pour couper la longueur nécessaire de pellicule, de moyens de retenue (23, 26) pour retenir l'extrémité antérieure de la pellicule extensible (12) qui est destinée à être utilisée pour l'opération d'enveloppement suivante, ainsi que de deux buses de pulvérisation de colle de chaque côté du plateau, l'une disposée au-dessus de l'autre et chacune appliquant un filet (38) de colle sur l'une des parois latérales du plateau, et en ce que la table de levage (1) est conçue pour élever le pJateau (2), avec le groupe d'articles (3) dessus, vers le haut contre la pellicule extensible (12), et en ce que les organes de manipulation (13, 14) sont conçus, tandis qu'ils sont déplacés simultanément depuis des sens opposés vers l'intérieur et vers le plateau (2), pour envelopper le groupe d'articles (3) dans la pellicule extensible (12) et, avec l'aide de leurs mâchoires de serrage (29 et 33) presser la pellicule initialement contre celui des filets (38) de colle qui est en haut et, une fois que les moyens de serrage (13, 14) ont relâché le serrage de la pellicule, presser celui-ci contre le filet inférieur pour l'adhérence de la pellicule extensible (12) au plateau (2).
3. Machine selon la revendication 2, caractérisée en ce que l'une des mâchoires de serrage (29, 33) de chacun des organes de manipulation (13, 14) est munie d'un patin de pression (40) pressant la pellicule extensible (12) contre le plateau (2) dans la région du filet (38) de colle.
4. Machine selon la revendication 2, caractérisée en ce que le moyen de sectionnement (39) du deuxième organe de manipulation (14) est monté sur l'une des mâchoires de serrage (29, 31) de cet organe de manipulation et conçu pour couper la pellicule extensible (12) pendant que les mâchoires de serrage enserrent celle-ci.
EP82903494A 1981-11-30 1982-11-25 Procede d'emballage d'articles disposes sur des plateaux dans un film extensible et machine de mise en oeuvre du procede Expired EP0094955B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8107117A SE8107117L (sv) 1981-11-30 1981-11-30 Forfarande for paketering av foremal pa en bricka medelst streckfilm och maskin for gneomforande av forfarandet
SE8107117 1981-11-30

Publications (2)

Publication Number Publication Date
EP0094955A1 EP0094955A1 (fr) 1983-11-30
EP0094955B1 true EP0094955B1 (fr) 1986-12-30

Family

ID=20345156

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82903494A Expired EP0094955B1 (fr) 1981-11-30 1982-11-25 Procede d'emballage d'articles disposes sur des plateaux dans un film extensible et machine de mise en oeuvre du procede

Country Status (6)

Country Link
EP (1) EP0094955B1 (fr)
JP (1) JPS58501990A (fr)
DE (1) DE3274832D1 (fr)
IT (1) IT1157096B (fr)
SE (1) SE8107117L (fr)
WO (1) WO1983001935A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2374062B (en) * 2001-04-03 2004-09-29 Fruits Of Ireland Method and apparatus for packaging trays of pots

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4036362A (en) * 1973-10-09 1977-07-19 Huntingdon Industries Incorporated Package

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2460974A1 (de) * 1973-12-29 1975-07-03 Asahi Dow Ltd Verfahren und vorrichtung zur verpackung von gegenstaenden mit einer dehnbaren folie
FR2267931A1 (en) * 1974-04-18 1975-11-14 Thimon Sa Deformable foil packaging system - has foil carried on spool passed around upper and lower surfaces of goods

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4036362A (en) * 1973-10-09 1977-07-19 Huntingdon Industries Incorporated Package

Also Published As

Publication number Publication date
IT8268376A0 (it) 1982-11-26
JPS58501990A (ja) 1983-11-24
WO1983001935A1 (fr) 1983-06-09
IT1157096B (it) 1987-02-11
SE8107117L (sv) 1983-05-31
DE3274832D1 (en) 1987-02-05
EP0094955A1 (fr) 1983-11-30

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